CN104678058A - Continuous monitoring device for flue gas emissions and automatic verification method for validity of monitoring data - Google Patents
Continuous monitoring device for flue gas emissions and automatic verification method for validity of monitoring data Download PDFInfo
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- CN104678058A CN104678058A CN201410851034.1A CN201410851034A CN104678058A CN 104678058 A CN104678058 A CN 104678058A CN 201410851034 A CN201410851034 A CN 201410851034A CN 104678058 A CN104678058 A CN 104678058A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract description 13
- 239000003546 flue gas Substances 0.000 title abstract description 13
- 238000012795 verification Methods 0.000 title abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 114
- 238000005259 measurement Methods 0.000 claims abstract description 53
- 238000005070 sampling Methods 0.000 claims abstract description 42
- 239000000779 smoke Substances 0.000 claims description 53
- 238000007664 blowing Methods 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 238000007781 pre-processing Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 239000003517 fume Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000012423 maintenance Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a continuous monitoring device for flue gas emissions and an automatic verification method for the validity of monitoring data. The device comprises a sampling device, a pretreatment device, an analysis device, a data acquisition device and a verification device, wherein the sampling device is connected with a flue, the pretreatment device is connected with the sampling device, the analysis device is connected with the pretreatment device, the data acquisition device and the verification device are connected with the analysis device, and a verification control device carries out automatic verification on the analysis device regularly and/or when the flue gas measured value monitored by the data acquisition device exceeds an emission limit value. According to the automatic verification method for the validity of monitoring data disclosed by the invention, through carrying out automatic verification on a gas analyzer regularly and/or when the flue gas measured value exceeds an emission limit value, and judging whether the instrument error of the gas analyzer is in an allowed range, valid data is identified, so that the technical problem that existing continuous monitoring devices for flue gas emissions can not evidence the accuracy of measurement data is solved, the evidencing to the accuracy of measurement data is realized, and the accuracy of data measuring of the continuous monitoring device for flue gas emissions is improved.
Description
Technical Field
The invention relates to the field of flue gas emission monitoring, in particular to a continuous flue gas emission monitoring device and an automatic validity checking method of monitoring data.
Background
The continuous monitoring device for the smoke emission is applied to monitoring harmful factors polluting the atmosphere in the industrial waste gas emission, commonly comprises sulfur dioxide, nitrogen oxide, smoke dust and the like, and aims to provide basic data for the work of total amount assessment, supervision and law enforcement, pollution discharge declaration and verification and the like of an environment protection administrative department. Referring to fig. 1, the existing continuous monitoring device for flue gas emission consists of a particulate matter monitoring device, a gaseous pollutant monitoring device, a flue gas emission parameter monitoring device and a data acquisition device. At present, the main stream adopts direct extraction and sampling, and the sampling enters an analytical instrument for analysis and detection after being pretreated (including a cold dry method and a hot wet method).
The prior continuous monitoring device for flue gas emission has poor stability and insufficient reliability in the practical application process; accuracy of measured data cannot be confirmed; there are many vulnerabilities in supervision, which are not conducive to supervision. And the method is also insufficient for providing basic data for the work of total amount assessment, supervision and law enforcement, pollution discharge declaration and verification and the like of an environmental protection administrative department. Particularly, the existing continuous monitoring device for smoke emission cannot assist in verifying the accuracy of measured data, for example, when the system measures the overproof data, the accuracy of the overproof data cannot be assisted, namely whether the data actually exceed the standard or whether the data exceed the standard due to errors generated by the measuring instrument of the system can not be distinguished according to the measured overproof data. Therefore, it is necessary to develop a continuous monitoring device for smoke emission, which can prove the accuracy of the measured data.
Disclosure of Invention
The invention provides a continuous monitoring device for smoke emission and a method for checking validity of monitoring data thereof, which aim to solve the technical problem that the existing continuous monitoring device for smoke emission cannot prove the accuracy of the measured data.
According to one aspect of the present invention, there is provided a continuous monitoring device for smoke emissions, comprising:
the device comprises a sampling device connected with a flue, a preprocessing device connected with the sampling device, an analyzing device connected with the preprocessing device and a data collecting device connected with the analyzing device; it is characterized in that the preparation method is characterized in that,
the continuous monitoring device for the smoke emission also comprises a checking device, wherein the checking device comprises a checking gas input end, a switching device and a checking control device;
the switching device comprises a first reversing end for communicating the preprocessing device with the analysis device and a second reversing end for communicating the checking gas input end with the analysis device;
and the checking control device is used for controlling the switching device to be switched to the second reversing end periodically and/or when the smoke measurement value monitored by the data acquisition device exceeds the emission limit value, and automatically checking the analysis device.
Further, the checking gas input end is connected with the second reversing end through a regulating valve.
Further, the checking gas input end is provided with a pressure sensor, and the pressure sensor is used for detecting the gas pressure of the checking gas input end.
Further, the switching device is an electric control valve or a pneumatic control valve.
Furthermore, the analysis device comprises a flow controller and a gas analyzer, wherein one end of the flow controller is connected with the switching device, and the other end of the flow controller is connected with the gas analyzer.
Furthermore, the continuous monitoring device for the smoke emission also comprises a back-blowing automatic control device, a sampler temperature alarm device and a sampling flow alarm device which are connected with the sampling device, and a pretreatment temperature alarm device which is connected with the pretreatment device; wherein,
the back-flushing automatic control device is used for automatically back-flushing the sampling device when the flow value monitored by the data acquisition device is lower than the flow discharge limit value;
the sampler temperature alarm device is used for alarming when the sampling temperature monitored by the data acquisition device is abnormal;
the sampling flow alarm device is used for alarming when the sampling flow value monitored by the data acquisition device is abnormal;
and the preprocessing temperature alarm device is used for alarming when the preprocessing temperature monitored by the data acquisition device is abnormal.
Furthermore, the continuous monitoring device for the smoke emission also comprises a data processing device connected with the data acquisition device, a data transmission device connected with the data processing device and a remote management platform connected with the data transmission device;
the data processing device is used for converting the output data of the data acquisition device and then transmitting the converted output data to the remote management platform through the data transmission device;
the remote management platform is used for remotely monitoring and managing the output data of the data transmission device;
the data acquisition device is also connected with an automatic identification device for carrying out classification identification on the output data of the data acquisition device and a log recording device for storing the output data of the data acquisition device.
Further, the remote management platform is at least connected with an automatic data validity auditing and counting device, a remote back-blowing control device, a standard gas checking device and an overproof checking and alarm reminding device; wherein,
the automatic data validity auditing and counting device is used for distinguishing valid data from invalid data and counting the effective rate of the data;
the remote back-blowing control device is used for carrying out remote automatic back-blowing control on the sampling device;
the standard gas checking device is used for carrying out remote automatic checking control on the checking device;
and the standard exceeding checking and alarm reminding device is used for performing differential display and short message reminding on the data which are actually checked to exceed the standard.
According to another aspect of the present invention, there is provided a method for automatically checking validity of monitoring data of a continuous monitoring device for smoke emission, comprising:
collecting the smoke measurement data of the data acquisition device periodically and/or when the smoke measurement value monitored by the data acquisition device exceeds the emission limit value;
measuring an instrument error of the gas analyzer;
and judging whether the instrument error of the gas analyzer is within an allowable range, if so, taking the smoke measurement data as effective measurement data, otherwise, taking the smoke measurement data as ineffective measurement data, and automatically calibrating the gas analyzer.
Further, measuring instrument errors of the gas analyzer includes:
measuring the standard gas at the input end of the inspection gas to obtain standard gas measurement data;
comparing the standard gas measurement data with standard gas standard data to obtain the drift of the gas analyzer;
drift was taken as the instrument error for the gas analyzer.
The invention has the following beneficial effects:
the invention discloses a continuous monitoring device for smoke emission and a method for automatically checking validity of monitoring data. The method for automatically checking the validity of the monitoring data solves the technical problem that the existing continuous monitoring device for the smoke emission cannot assist in verifying the accuracy of the measured data, thereby realizing the verification of the accuracy of the measured data and improving the data measurement accuracy of the continuous monitoring device for the smoke emission by periodically and/or judging that the gas analyzer is automatically checked when the measured value of the smoke exceeds the emission limit value and judging whether the instrument error of the gas analyzer is within the allowable range to distinguish the valid data.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of a continuous monitoring device for fume emission in the prior art;
FIG. 2 is a block diagram of a continuous monitoring device for smoke emission according to a preferred embodiment of the present invention;
fig. 3 is a block diagram of a checking apparatus according to a preferred embodiment of the present invention.
Description of reference numerals:
1. a flue; 2. a sampling device; 3. a heat tracing pipeline; 4. a pretreatment device; 5. a verification device; 6. an analysis device; 7. a data acquisition device; 8. a data processing device; 9. a data transmission device; 10. a sampler temperature alarm device; 11. a back-blowing automatic control device; 12. a heat tracing pipeline alarm device; 13. a pre-treatment temperature alarm device; 14. a log recording device; 15. an automatic identification device; 16. a remote management platform; 17. an automatic data validity auditing and counting device; 18. a remote back-blowing control device; 19. a standard gas checking device; 20. a data display and printing device; 21. an overproof checking and alarm reminding device; 22. a flow controller; 23. a gas analyzer; 24. a pressure sensor; 25. adjusting a valve; 26. sampling flow alarm device.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Referring to fig. 2, a preferred embodiment of the present invention provides a continuous monitoring device for smoke emission, comprising: the device comprises a sampling device 2 connected with a flue 1, a preprocessing device 4 connected with the sampling device 2, an analyzing device 6 connected with the preprocessing device 4 and a data collecting device 7 connected with the analyzing device 6; the continuous monitoring device for the smoke emission also comprises a checking device 5, wherein the checking device 5 comprises a checking gas input end, a switching device and a checking control device; the switching device comprises a first reversing end for communicating the preprocessing device 4 with the analysis device 6 and a second reversing end for communicating the checking gas input end with the analysis device 6; and the checking control device is used for controlling the switching device to be switched to the second reversing end periodically and/or when the smoke measurement value monitored by the data acquisition device 7 exceeds the emission limit value, and automatically checking the analysis device 6.
The invention controls the switching device to switch to the second reversing end and automatically checks the analysis device 6 periodically through the checking control device in the checking device 5 and/or when the smoke measurement value monitored by the data acquisition device 7 exceeds the emission limit value. Specifically, in this embodiment, by periodically automatically checking the analysis device 6, the analysis device can be periodically automatically checked, so that the validity of the data is checked, which is beneficial to improving the accuracy and validity of the measurement data. The technical problem that the existing continuous monitoring device for the smoke emission cannot assist in verifying the accuracy of the measured data is solved, the accuracy of the measured data is verified, and the data measurement accuracy of the continuous monitoring device for the smoke emission is improved.
Referring to fig. 3, the checking device 5 has the following structural block diagram and working principle:
the check gas input is connected to the second reversing port via a regulating valve 25. Alternatively, the regulating valve 25 in this embodiment is a proportional regulating valve, and the switching device is a two-position three-way solenoid valve DCF4, but it is easy to think that the switching device may also be other electrically controlled valves or pneumatic control valves.
Optionally, the analyzing device 6 comprises a flow controller 22 and a gas analyzer 23, one end of the flow controller 22 is connected to the first output of the switching device, and the other end of the flow controller 22 is connected to the gas analyzer 23. The flow controller 22 is used to control the sampling flow rate to be constant at a flow rate value required by the analyzing device 6 (generally, the sampling flow rate is 1L/min). The input end of the checking gas is filled with zero gas or standard gas according to the requirement, and the embodiment is provided with two input ends of NO standard gas and SO2 standard gas. The first reversing end of the two-position three-way electromagnetic valve DCF4 is communicated with the preprocessing device 4 and used for communicating a sample gas channel, the second reversing end of the two-position three-way electromagnetic valve DCF4 is communicated with the checking gas input end and used for communicating a standard gas channel, sample gas enters the gas analyzer 23 for measurement during normal measurement, and when the smoke measurement value monitored by the data acquisition device 7 exceeds the emission limit value, the switching device is controlled to be switched to the second reversing end, so that the gas analyzer 23 is communicated with the checking gas input end. The on-off of the standard gas is controlled by a valve, a pressure reducing regulating valve is arranged at the outlet of the gas cylinder, the gas pressure of the full cylinder is 10MPa, and the pressure is reduced to about 0.5MPa through the pressure reducing valve. The outlet of the pressure reducing valve is connected with the two-position three-way solenoid valve DCF4 through a pipeline.
Optionally, the check gas input is provided with a pressure sensor 24, the pressure sensor 24 being adapted to detect the gas pressure at the check gas input. The pressure sensor 24 is used for measuring the pressure of the standard gas bottle so as to monitor the use amount of the standard gas, because the pressure is gradually reduced along with the use of the standard gas, and when the pressure is reduced to be lower than 0.5MPa, the system reminds that the standard gas needs to be replaced. Alternatively, the data collecting device 7 collects pressure measurement data of the pressure sensor 24, when the detected pressure measurement data does not meet the requirement, the data collecting device 7 transmits the pressure measurement data to the checking device 5, and the checking control device of the checking device 5 outputs a control signal to control the on/off of the SO2 input valve DDQF1 or the NO input valve DDQF 2.
The working process is as follows: under the normal measuring condition, the first switching-over end of two-position three-way solenoid valve DCF4 switches on, and the standard gas passageway is closed, and gas analyzer 23 only measures and analyzes sample gas under normal condition promptly, and the standard gas passageway is closed. When the measured value of the flue gas monitored by the data acquisition device 7 exceeds the emission limit value, the checking control device controls the first reversing end to be disconnected, the second reversing end is conducted, the sample gas channel is closed, the standard gas channel is opened, the checking control device controls the SO2 input valve DDQF1 to be opened, the SO2 standard gas is introduced, the flow controller 22 controls the proportional control valve 25 to control the flow rate to be required, the measured value of the analyzer is stable after being introduced for 3-5 minutes, the checking control device controls the SO2 input valve DDQF1 to be closed, meanwhile, the data acquisition device 7 acquires span data of the SO2 and zero point data of NO, compares the span data with the standard concentration value, and calculates whether the drift is within an allowable range. Similarly, when checking that the gas input end inputs NO gas, the checking control device controls the NO input valve DDQF2 to be opened, the NO standard gas is introduced, the flow controller 22 controls the proportional control valve 25 to control the flow rate of the introduced gas to be required, the measured value of the analyzer is stable after the introduced gas is introduced for 3-5 minutes, the checking control device controls the NO input valve DDQF2 to be closed, the two-position three-way electromagnetic valve DCF4 is switched to the sample gas channel, and the test is finished.
The data acquisition device 7 acquires the NO data and the zero point data of the SO2, and compares the data with the standard concentration value to calculate whether the drift is within an allowable range. When the drift is within the allowable range, it indicates that there is no problem in the measurement instrument of the gas analyzer 23, and the detected measurement data is determined as valid data, and when the drift is beyond the allowable range, it indicates that an error occurs in the measurement instrument of the gas analyzer 23, which causes the measured data to be inaccurate, and thus, the data is determined as invalid data. In this embodiment, the emission limit may be set arbitrarily, and a plurality of emission limits or value intervals, such as superstandard data, zero data, and overrange data, may be set according to actual needs. Therefore, by adopting the checking module provided by the invention, when the data acquisition device 7 acquires abnormal data, the accuracy of the gas analyzer 23 can be automatically checked, so that the accuracy of the measured data can be proved. Alternatively, when the system needs to periodically or automatically detect the zero degree/span drift of the gas analyzer 23, it is only necessary to issue a corresponding control command to the checking control device in the checking device 5.
Optionally, the gaseous contaminant monitoring device further comprises a heat trace line 3 connecting the sampling device 2 and the pre-treatment device 4.
Optionally, the gaseous pollutant monitoring device further comprises a back-flushing automatic control device 11, a sampler temperature alarm device 10 and a sampling flow alarm device 26 which are connected with the sampling device 2, a pretreatment temperature alarm device 13 which is connected with the pretreatment device 4, and a heat tracing line temperature alarm device 12 which is connected with the heat tracing line 3. The back-flushing automatic control device 11 is used for carrying out automatic back flushing on the sampling device 2 when the flow value monitored by the data acquisition device 7 is lower than the flow discharge limit value; the sampler temperature alarm device 10 is used for alarming when the sampling temperature monitored by the data acquisition device 7 is abnormal; a sampling flow alarm device 26 for alarming when the sampling flow value monitored by the data acquisition device 7 is abnormal; and the preprocessing temperature alarm device 13 is used for alarming when the preprocessing temperature monitored by the data acquisition device 7 is abnormal.
The measurement conditions of the continuous monitoring of the flue gas emission generally comprise that the temperature of a sampler is heated to a proper working temperature (the general site is not lower than 150 ℃, except for a special site), a heat tracing pipeline 3 is heated to a proper working temperature (the general heating temperature is not lower than 120 ℃, except for the special site), a hot wet method pretreatment device 4 is heated to a proper working temperature (the general heating temperature is not lower than 120 ℃, except for the special site), the condensation temperature of a cold dry method pretreatment device 4 is 3-5 ℃, and the sampling flow is constant at the flow value (the general sampling flow is 1L/min) required by an analysis device 6. In the embodiment, by adding the automatic back-flushing control device 11, the sampler temperature alarm device 10 and the sampler flow alarm device 26 which are connected with the sampling device 2, the pretreatment temperature alarm device 13 connected with the pretreatment device 4 and the heat tracing pipeline 3 temperature alarm device connected with the heat tracing pipeline 3, the continuous monitoring device for smoke discharge can monitor the analog quantity and the switching quantity of the measurement condition, set abnormal alarm and record the detailed log of the measurement data, and can also realize the function of automatic fault repair, if the measurement flow is too low, the automatic back-flushing control device 11 is started to normally and automatically repair the flow, thereby ensuring the continuous, stable and reliable operation of the system.
Optionally, the continuous monitoring device for smoke emission further comprises a data processing device 8 connected with the data acquisition device 7, a data transmission device 9 connected with the data processing device 8, and a remote management platform 16 connected with the data transmission device 9; the data processing device 8 is used for converting the output data of the data acquisition device 7 and then transmitting the converted output data to the remote management platform 16 through the data transmission device 9; the remote management platform 16 is used for remotely monitoring and managing the output data of the data transmission device 9; the data acquisition device 7 is also connected to an automatic identification device 15 for identifying the output data of the data acquisition device 7 by classification and a log recording device 14 for storing the output data of the data acquisition device 7.
Optionally, the remote management platform 16 is connected with an automatic data validity auditing and counting device 17, and/or a remote back-blowing control device 18, and/or a standard gas checking device 19, and/or a data display and printing device 20, and/or an overproof checking and alarm reminding device 21. An automatic data validity auditing and counting device 17 for distinguishing valid data from invalid data and counting the effective rate of the data; the remote back-blowing control device 18 is used for carrying out remote automatic back-blowing control on the sampling device 2; the standard gas checking device 19 is used for carrying out remote automatic checking control on the checking device 5; and the standard exceeding checking and alarm reminding device 21 is used for performing distinguishing display and short message reminding on the data which are actually checked to exceed the standard.
The automatic identification device 15 is mainly used to distinguish the measurement data of each operation state, for example, the identification "N" is normal measurement, "S" is equipment disconnection, "Md" is missing data, "M" is maintenance blowback, "C" is calibration data, "O" is data out of standard, "D" is instrument failure, "F" is discharge source shutdown, "and" T "is over-range measurement. The measured data of each running state is distinguished by the identification, the broken line data, the missing data, the maintenance back-blowing data and the instrument fault data of the equipment are regarded as abnormal data, the exceeding data, the abnormal data and the calibration data of any time period can be inquired, the exceeding data/exceeding range data check drift is valid data in a normal range, the abnormal data is determined as invalid data, the calibration data is determined as invalid data, and the emission source shutdown data is determined as invalid data. Therefore, massive data are automatically distinguished, and the pollution discharge condition is accurately reflected by automatic data validity examination.
The field end supervision and management can be safely and conveniently realized through the remote management platform 16. In addition to uploading the monitoring data, the site side also uploads the detailed operation log records and the status identifier to the remote management platform 16. The operation condition of the field equipment can be mastered in real time. The remote management platform 16 distinguishes through each identified data, can clearly display and inquire valid data and invalid data, accurately count the data efficiency, and automatically check and count mass data. The remote management platform 16 can also perform remote back-control automatic standard gas check on the field end to check the accuracy of the field end instrument. The management platform sends a checking command, after the field end system receives the checking command, the zero point/span drift of the standard gas checking analysis instrument is automatically communicated, the checking result is uploaded to the platform for inquiring, and the accuracy of the field equipment is remotely checked. The remote management platform 16 performs short message reminding on the data which are actually checked to be out of standard, besides differential display, and reminds main management personnel. And (4) what pollution discharge is caused by what parameters exceed the standard discharge at what time, so that corresponding treatment measures are taken in time. The remote management platform 16 can perform remote anti-control automatic anti-purging on the field end, clean a sampling device of the system and realize automatic maintenance of the system. The management platform sends a back flushing command, the field end system receives the back flushing command, a back flushing function is started, the adopted device is cleaned, and remote system maintenance is achieved. The remote management platform 16 can manage daily maintenance work, and records operation and maintenance work records and reports operation and maintenance work conditions through the lower end, and data supplementary recording can be lost when a faulty device reports a processing flow. The remote management platform 16 can visually display the emission concentration variation trend of each pollution factor of each pollution source through a historical curve. The remote management platform 16 can count the emission of each pollution factor of each pollution source, and graphically and visually display the variation trend of the emission of each pollution factor of each pollution source, and the statistics is carried out monthly, quarterly and annually.
Optionally, the present invention further provides a method for automatically checking data validity based on the continuous monitoring device for smoke emission, including: collecting the smoke measurement data of the data acquisition device 7 periodically and/or when the smoke measurement value monitored by the data acquisition device 7 exceeds the emission limit value; measuring an instrument error of the gas analyzer 23; and judging whether the instrument error of the gas analyzer 23 is within an allowable range, if so, taking the smoke measurement data as effective measurement data, and if not, taking the smoke measurement data as ineffective measurement data. Optionally, measuring the instrument error of the gas analyzer 23 comprises: measuring the standard gas at the input end of the inspection gas to obtain standard gas measurement data; comparing the standard gas measurement data with the standard gas standard data to obtain the drift of the gas analyzer 23; drift is taken as the instrument error of the gas analyzer 23. Optionally, after the system measures the instrument error of the gas analyzer 23, when the instrument error of the gas analyzer 23 is found to be out of the allowable range, a corresponding calibration signal for automatically calibrating the gas analyzer 23 is also sent, so that manual calibration of the gas analyzer 23 is not required, and continuous and stable operation of the whole apparatus is realized.
The method for automatically checking the data validity based on the continuous smoke emission monitoring device can automatically check the validity of the measured data, and mainly collects the smoke measured data of the data acquisition device 7 periodically and/or when the smoke measured value monitored by the data acquisition device 7 exceeds the emission limit value; measuring an instrument error of the gas analyzer 23; and judging whether the instrument error of the gas analyzer 23 is within an allowable range, if so, taking the smoke measurement data as effective measurement data, otherwise, taking the smoke measurement data as ineffective measurement data, and automatically calibrating the gas analyzer 23. The problem that the prior art can not automatically check the validity of the smoke measurement data is solved, so that the accuracy of the measurement data is proved, and the accuracy of the smoke emission continuous monitoring data measurement is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A continuous monitoring device for smoke emissions, comprising:
the device comprises a sampling device (2) connected with a flue (1), a pretreatment device (4) connected with the sampling device (2), an analysis device (6) connected with the pretreatment device (4), and a data acquisition device (7) connected with the analysis device (6); it is characterized in that the preparation method is characterized in that,
the continuous monitoring device for the smoke emission also comprises a checking device (5), wherein the checking device (5) comprises a checking gas input end, a switching device and a checking control device;
the switching device comprises a first reversing end for communicating the preprocessing device (4) with the analysis device (6) and a second reversing end for communicating the checking gas input end with the analysis device (6);
and the checking control device is used for controlling the switching device to be switched to the second reversing end periodically and/or when the smoke measurement value monitored by the data acquisition device (7) exceeds the emission limit value, and automatically checking the analysis device (6).
2. The continuous monitoring device of fume emission according to claim 1,
the checking gas input end is connected with the second reversing end through a regulating valve (25).
3. The continuous monitoring device of fume emission according to claim 2,
the checking gas input end is provided with a pressure sensor (24), and the pressure sensor (24) is used for detecting the gas pressure of the checking gas input end.
4. The continuous monitoring device of fume emission according to claim 3,
the switching device is an electric control valve or a pneumatic control valve.
5. The continuous monitoring device of fume emission according to claim 4,
the analysis device (6) comprises a flow controller (22) and a gas analyzer (23), one end of the flow controller (22) is connected with the switching device, and the other end of the flow controller (22) is connected with the gas analyzer (23).
6. The continuous monitoring device of fume emission according to claim 5,
the continuous monitoring device for the smoke emission also comprises a back-blowing automatic control device (11), a sampler temperature alarm device (10), a sampling flow alarm device (26) and a pretreatment temperature alarm device (13), wherein the back-blowing automatic control device, the sampler temperature alarm device and the sampling flow alarm device are connected with the sampling device (2), and the pretreatment temperature alarm device (13) is connected with the pretreatment device (4); wherein,
the back flushing automatic control device (11) is used for carrying out automatic back flushing on the sampling device (2) when the flow value monitored by the data acquisition device (7) is lower than the flow discharge limit value;
the sampler temperature alarm device (10) is used for alarming when the sampling temperature value monitored by the data acquisition device (7) is abnormal;
the sampling flow alarm device (26) is used for alarming when the sampling flow value monitored by the data acquisition device (7) is abnormal;
and the preprocessing temperature alarm device (13) is used for giving an alarm when the preprocessing temperature value monitored by the data acquisition device (7) is abnormal.
7. The continuous monitoring device of fume emission according to any one of claims 1 to 6,
the continuous monitoring device for the smoke emission also comprises a data processing device (8) connected with the data acquisition device (7), a data transmission device (9) connected with the data processing device (8), and a remote management platform (16) connected with the data transmission device (9);
the data processing device (8) is used for converting the output data of the data acquisition device (7) and then transmitting the converted output data to the remote management platform (16) through the data transmission device (9);
the remote management platform (16) is used for remotely monitoring and managing the continuous fume emission monitoring device;
the data acquisition device (7) is also connected with an automatic identification device (15) for performing classification identification on the output data of the data acquisition device (7) and a log recording device (14) for storing the output data of the data acquisition device (7).
8. The continuous monitoring device of fume emission according to claim 7,
the remote management platform (16) is at least connected with an automatic data validity auditing and counting device (17), a remote back-blowing control device (18), a standard gas checking device (19) and an overproof checking and alarm reminding device (21); wherein,
the automatic data validity auditing and counting device (17) is used for distinguishing valid data from invalid data and counting the effective rate of the data;
the remote back-blowing control device (18) is used for carrying out remote automatic back-blowing control on the sampling device (2);
the standard gas checking device (19) is used for carrying out remote automatic checking control on the checking device (5);
and the standard exceeding checking and alarm reminding device (21) is used for performing distinguishing display and short message reminding on the data which are actually checked to exceed the standard.
9. A method for automatically checking validity of monitoring data based on the continuous monitoring device for smoke emission as described in claims 1 to 8, comprising:
periodically and/or when the smoke measurement value monitored by the data acquisition device (7) exceeds an emission limit value, acquiring smoke measurement data of the data acquisition device (7);
measuring an instrument error of the gas analyzer (23);
and judging whether the instrument error of the gas analyzer (23) is within an allowable range, if so, taking the smoke measurement data as effective measurement data, otherwise, taking the smoke measurement data as ineffective measurement data, and automatically calibrating the gas analyzer (23).
10. The method of claim 9, wherein measuring the instrument error of the gas analyzer (23) comprises:
measuring the standard gas at the gas checking input end to obtain standard gas measurement data;
comparing the standard gas measurement data with standard gas standard data to obtain the drift of the gas analyzer (23);
the drift is taken as an instrument error of the gas analyzer (23).
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